CESTODES
Taenia spp.
Taenia
solium
Taenia
saginata
Taenia
asiatica
Pork
tapeworm
Beef
tapeworm
Acquired by
eating raw
pig liver
Cysticercus
cellulosae
Cysticercus
bovis
Egg
WITH rostellum and double crown (hooks)
NO rostellum and double crown (opposite of
T. solium)
SUNKEN rostellum and two rows of hooklets
Infective stage:
Cysticercus larval stage
Treatment: Praziquantel
FOUR suckers
Scolices
Proglottids
Disease
Taenia
solium
Square appearance
Average number: 898
Taenia
saginata
B. Embryophore
Cysticercosis
Rectangle appearance
Average number: 1048
Hymenolepis spp.
Eggs
Hymenolepis
diminuta
Rat tapeworm;
grain or cereal
are not
protected from
rats and insects
Scolices
• Rostellum
bearing NO
hooks
Infective Stage:
Cystercoid larvae
• Colorless embryophore
• DISTINCT polar thickenings
• NO polar filaments
Hymenolepis
nana
Intermediate Host:
Tribolium beetles
• Short
rostellum
WITH one
row of hooks
Dwarf
tapeworm
• Colorless embryophore
• Shell complete with polar
thickenings
• NUMEROUS polar filaments
Treatment:
Praziquantel
Dipylidium
caninum
• Dog/cat
tapeworm
• Pumpkin seed
tapeworm
Diphyllobothrium • Broad fish
latum
tapeworm
•
•
•
•
Scolex
Rostellum: clubshaped retractable
SPINES instead of
hooks (ROSE-THORN
shaped)
ALMOND shape
Two long sucking
GROOVES
Eggs
Dipylidium
caninum
Diphyllobothrium
latum
• OPERCULUM – lid
structure
• ABOPERCULAR KNOB –
terminal knob
Proglottids
• TWO sets of
reproductive organ
(male and female)
• ROSETTE-shaped
formation
• CENTRAL uterine
structure
Proglottid
• 1st IH: Cyclops
specie copepod
• 2nd IH: Freshwater
fish